Shoe-pressing machine



2-3, 1930. A. H. DAvls SHQE PRESSING MACHINE Filed Oct. 8. 1929 5 Sheets-Sheet l 7/ NVENTUR Mw @y 23, 1930. A. H. DAVIS 1,785,938

SHOE PRESSING MACHINE Filed Oct. 8, 1929 .'5 Sheets-Sheet 2 NVENTUR l Mw Dec. z3, 1930. A. H. DAws 1,785,938

SHOE PRESSING MACHINE Filed Oct. 8. 1929 5 Sheets-Sheet 3 INVENTUR Mry# cation to a sole-laying Or-pressing machine of Patented Dec. 23, 1930 UNITED stares `earalvr OFFICE ALSON. H. DAVIS, ,OE'LYNNQ MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY foonronarloit, or rnfrnasoim NEW amasar,

A CORPORATION F NEW JERSEY Asuon-rnEssnver MACHINE l Application :nea october s, 1929 4serial No. 398,251.

rlhis invention relates to machines for applyingpressure to the bottoms of shoes.' The invention is herein villustrated inits appli- I; well-known type shown and described in nite'd `States'Letters Patent No."l,549,243,

. granted on August 11, 1925, upon an applicat`on of E. Erwinkley, but it is to be under-` i stood that Vin its more general aspects it is not limited to machines of that particular type.

In a machine of the character illustrated in the above-mentioned Letters Patent each shoe is subjected through yieldable means to heavy pressure, and the machine then comes automatically to a stop with the shoe under pressure. A'machine of this type is com- ,monly, Operated through a friction `clutch under control of a member which is movable manually in one direction to start the machine` and ismovable automatically inthe opposite direction to stop the machine. To cons trol this member in such manner as to stop the lmachine at the required time and also not to 'interfere thereafter with its movement to start the machine, there is provided a stopping device including a spring-controlled part which, in acting on the member in the direction to stop the machine, is first yieldable against the resistance of its controlling spring before it becomes normally operative tomove the member Vin that direction, in order that the spring may -actby its resiliency after the stopping of lthe machine to carry said part to a position out of the path of the next starting movement of the member. It is an obj ect of the present invention to insure against 'any possibility of premature movement of the clutch-controlling member in response to the yielding action ofsuch a stoppingdevice thereon, and thus to guard against any slipping` of the clutch near the end of the operation of the machine under the heavy load encountered in applying pressure to a shoe. vFor the purpose in view the Vconstruction herein shown comprises, in .combination with a'stopping device of the character above outlined, automatic means arranged to act onthe clutch-controlling member to prevent its movement in the direction to stop themachine until the pressure-applying., mechanism has arrived substantially in its normal stopping position. More particularly, as herein illustrated, there is provided a cam arranged to engage the clutch-controlling member on the opposite side from the stopin its normal stopping position.

rThe invention will now be more particularly described by reference to the accompanying drawings and thereafter pointed out in the claims.

In the drawings,

Fig. 1 is a View in front elevation of a oortion of a machine in which the invention is embodied, with parts broken away;

F ig. 2 is a plan view of a portion of the operating and controlling mechanism, with parts broken away;v

3 is a view partly in Vfront elevation and partly in section,rshowing portions of the mechanism illustrated in Fig. 2, the section being mainly on the line III- III of Fig. 2.

Fig. l is a perspective view illustrating more fully the construction of portions of the controlling mechanism; and

Fig. 5 is a perspective view showing portions of the mechanism illustrated in Fig. 4t in separated relation.

As more fully disclosed in the above-mentioned Letters Patent, the machine herein shown comprises twin mechanisms forapplying` 'sole-laying or shaping pressure to the bottoms of different shoes alternately. Each these mechanisms includes a pad box 1() and a yieldable pad 12 thereon forapplying pressure to the sole of a shoe positioned by a jack comprising a last pin 14 and a toe rest 16, each pad box 10 beingcarried by a holder 18 slidingly movable upon a pair of vertical rods 20, only one'of which is visible in the drawings. Operative movement is imparted to each holder 18 through a toggle compris`4 -ing a link 22 pivoted at 24. to the holder and another link 26 pivoted at 28 to the link 22 and pivoted at 30 to a lever 32 which is fulcrumed at upon the frame of the machine. T here are thus two levers 32 arranged with their inner ends 36 side by side and in engagement witl an upwa 'dly and downwardly movable member 38 which serves as an abutment for the lower end of a heavy springv l0 controlled in a manner more particularly described in the above-'nentioned Letters Patent. lt vi be undo stoot that upward movement of each pad boli 10 to apply pressure to a shoe is effected by straightening its toggle 22, 26, and that during` the latter part or the pressure-applying operation the lever 32 yields against the resistance of the spring 110, so that the shoe subjected to heavy pressure through the spring. The opposite pairs of toggle links are controlled by a cross linl the opposite ends of which are con* nected at lllto the lower toggle links 26, so that when the toggle of one of the twin pressureapplying` mechanisms is straightened to apply 1pressure to a` shoe, the toggle of the other mechanism is broken to release from pressure a` shoe previously operated upon by that mechanism. Both toggles are operated by link #t6 one end of which is connected at le to the linlr -6 of the left-hand toggle and the opposite end to a wrist pin i8 on a `wheel which is fast on a. shaft 52. rlhc gear wheel 50 is driven by a smaller gear wheel fast on a clutch-driven shaft 56 which is parallel to the shaft rl`he machine is operated by a belt pulley (lli l) which is loosely mounted on the shaft 52 and drives pinion 60 in opera.- tive engagement with a gear wheel 62 loosely mounted on the shaft 56. llhe gear wheel 62 has a hub portion 64 which serves as one element of a friction clutch and extends into a recess in a member 66 which has a hub portion 68 fast on the shaft 56. ln the recess in the member 66 is mounted` a resilient coil clutch member 70 which extends around the hub 6-1 and abuts at one end against a screw i2 in the member 66, the other end of the member T0 having` thereon a lug' (11 arranged to be engaged by one end of a lever 76 which is pivoted at 78 on the member 66. .lit will be understood that the lever 76, when operated. has a wedgging action on the lu fr Tel to contract the clutch member 70 and thereby to effect a drivii connection between the two friction clutch elements 64 and 70 so that the shaft 56 is driven by the rear wheel 62. Movement oit the .lever T6 in the direction thus to actuatc the clutch and start the operation of the niaehiue eli'fccted by means of a spool S0 slidingly mounted on the shaft 56. this spool having` a substantially conical face for engaggiugij and operating the lever. The spool S0 is operated and controlled by means of a clutchcontrolling member 82 mounted on a roclri shaft 8l and provided with pins 86 projecting into an annular groove formed in the spool. rEhe i icinber 82 is provided with a curved arm 88 which is engaged and lifted by an arm 90 fast on a roclishaft 92 and operated by a treadle lever 94.

lt will thus be understood that by operation of the treadle lever 911 movenient is iniparted to the clutch-controllingmember 82 in the direc' n to start the machine, this member acting through the spool 80 to cause driving' engagement of the clutch member T0 with the member 6 so that the gear wheel 50 on the shaft 52 is operated through the gear 54e at a slower speed than the shaft 56. @poration of the machine to apply pressure to a shoe in one of the twin pressure mechanisms and to release a shoe previously operated upon by the other mechanism is effected by movement of the shaft 52 and the gear wheel. 50 through a half revolution, and it is accordingly necessary to bring the machine to a stop at the end of each half revolution of the shaft 52. For this purpose the shaft carries a stopping device comprising a collar 96 loosely mounted on the shaft and another collar 98 fast on the shaft and provided with pin 100 projecting into a slot 102 (Fig. in the collar 96, the latter having thereon diametrically opposite projections 104tone or the other of which is arranged to engage an inclined face on one side of a lug` 106 on the clutch-controlling member 82 and thereby to impart to this member movement in the opposite direction from that in which it is moved by the treadle lever 911. lt will be evident that the pin-andslot connection between the collars 96 and 9S permits relative turning movement of these parts between limits determined by the slot. For controlling the collar 96 there is provided a light spring; 108 connected at one end to the collar and at its other end to a sleeve 110 which fast on the shaft 52, this spring acting normally to maintain the collar 96 in a position in which a shoulder 112 at one end of the slot 102 is in engagement with the pin 100, as illustrated in Fig. fl. ln ne operation of the mechanism the collar 96 accordingly turns with the shaft 52 until one of its projections 10st engages the lug;v 106, whereupon the lu g acts to retard the movement of the collar against the resistance of the spring 108 while the pin 100 travels to the other end of the slot 102. When the pin arrives in position to engage a shoulder 114i at the other end of the slot it acts positively to turn the collar 96 with the shaft 52, so that the projection 104: moves the member 82 in the direction to stop the machine. In this operation the collar 96 is carried to a positionwhere the spring 108 acts resiliently to return it to its normal position in relation to the pin 100, thus insuring that its projection 104.- will be carried entirely past the lug,` 106 and thus will not interfere with thereafter to vof the parts 96 andy 98 against the resistance of the spring v108A there is some tendency, through' the .force of the spring,-to impart to thefclutch-controlling'member 82 movement in the directionto release the clutch, even thoughthe spring108 is a comparatively light spring. For purposes of this invention there is accordingly provided means 'for insuring against such movement oit' the clutchcontrolling member until the pressure-applying mechanism has arrived substantially in its normal stopping position, that is, substantially until that point is reached Where the rotary stopping device becomes positive in its action on the member 82. Thismeans comprises, in cooperative relation to each of the projections 104 on the collar 96, a cam 116 herein shown as integral with the collar 98 and arranged to engage the lug 106 on the opposite side from the projection 104 i and thus to hold the clutch-controlling member 82 in position to prevent slipping of the clutch during the relative movement that occurs between the parts 96 and 98 prior to the positive action of the pin 100 on the shoulder 114. Insurance is thus aiiorded against the possibility of accidental slipping of the clutch near the end of the operation of the machine as the progressively increasing pressure is applied to the shoe. As herein illustrated, moreover, -each cam 116 is so constructed that it becomes eiiective in its action upon the member 82 immediately after the starting of the machine, thus insuring also that the clutch elements will be firmly engaged with each other at the beginning of the the operation of the machine in accordance with the disclosure of Letters Patent No. 1,694,445, granted on December 11, 1928, upon application of N.'H. Knowlton.

While the invention is herein illustrated in its application to a shoe-pressing machine of the twin type, it is to be understood that it is not thus limited in utility.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, the combination with mechanism for applying pressure to the bottoms of shoes, and powerdriven means including a friction clutch for operating said mechanism to apply the pressure, of a clutch-controlling member movable in different directions respectively to start the machine and to stop it with a shoe under pressure, means for moving said member .to stop the machine comprising a resilient device so constructed and arranged as to yield initially upon engagement with said member prior to its normal action to stop the machine and to assume finally by its resiliency a posiyber againstmovement tionoutof the path of startingmovement of the member, and means for insuring ,against movement of the'clutch-controlling member by said devicey until the pressure-applying mechanismhas arrived substantially in its normal stopping.1 position.

2. Ina-machine of the class described, the combination with mechanism for applying pressure to the 'bottoms of shoes, and powerdriven means including-a friction clutch for operatingsaid mechanism to apply the pressure, ofa clutch-controllingmember movable in diiferentxdirections respectively to start th'emachine and to stopfit with a shoe under pressure,rfmeaznsforumoving said member to stop the"machine'comprising a resilient device so constructed and arranged as to yield initially Aupon engagement with said member prior to itsnormal actironto stop the machine and'to assume finally byits resiliency aposition out ofthefp'athlof starting. movement of i the member,l and means `constructed and arranged to hold the clutch-controlling meminfthe directiontolstop the machineiin response to the initial yieldingaction of said device thereon.

3; Inamachine of the class described, the combination withl Ymechanism -fr pressurev to thebottoms ofshoes, and powerdriven means including friet-i on clutch` vfor 'applying ope-ratingsaid mechanismrto apply the presi sure, of a'clutch-controlling. member movable in dilierentwdirections respectively to start the machine andtostop it with ashoe under pressure, automatic means for vmoving said member to rstop thel machine including. a spring:-'controlled-v part yieldable. initially upon engagementA with saidr member Vprior. to its .normal action to stop the machine. and resiliently movableV thereafter to a` position out of the path of startingamovement of the member, and automatic means for preventing premature movement of the clutch-controllingf member' in the direct'ionlto stop the machine'in response to` the yielding action ol'V said spring-controlled part thereon.

4. In afma'chineof'the Vclass described, the combination with mechanism forV applying pressure to the bottoms oit shoes, and'powerdriven means including a friction clutch for operating said mechanism to apply therpressure, ofa clutch-controlling member movable in diiierent directions respectively to start the machine and to stop it with a shoe under pressure, automatic means for moving said member tostop the machine including a spring-controlled part arranged to act thereon first yieldingly and then positively and resiliently movable thereafter to a Aposition out of the .path of starting movement of the member, and automatic means for prevent-ing movement of the clutch-controlling' member in the direction to stopI the .machine substantiallyI vthroughout .the .yielding action ofl said spring-controlled part preceding its positive action.

In a machine of the class described, the combination with mechanism for applying pressure to the bottoms of shoes, and powerdriven means including a friction clutch for operating said mechanism to apply the pressure, of a clutch-controlling member movable in different directions respectively to start the machine and to stop it with a shoe under pressure, a rotatable device for moving said member to stop the machine including a swing-controlled part arranged to yield initially upon engagement with the member prior to its normal action to stop the machine and resiliently movable thereafter to a position out of the path of starting movement of the member, and a rotatable cam arranged to hold said clutch-controlling member against premature movement in the direction to stop the machine in response to the yielding action of said spring-controlled part thereon.

6. ln a machine of the class described, the combination with mechanism for applying pressure to the bottoms of slices, and powerdriven means including a friction clutch for operating said mechanism to apply the pressure, of a. clutch-controlling member movable in different directions respectively to start the machine and to stop it with a shoe under pressure, a rotatable shaft, a collar loosely mounted on said shaft and having a projection thereon for operating said member to stop the machine, a connection between said shaft and collar constructed to permit the shaft to move relatively to the collar upon engagement of said projection with the clutch-controlling member and to effect thereafter positive movement of the collar to operate said member, a spring arranged to be subjected to stress by the movement of the shaft relatively to the collar and operative i'inally to carry said projection out of the path of starting movement of the member, and a device carried by said shaft for preventing premature movement of the clutchcontrolling member in the direction to stop the machine under the influence of said spring.

7. In a machine of the class described, the combination with mechanism for applying pressure to the bottoms of shoes, and powerdriven means including a friction clutch for operating said mechanism to apply the pressure, of a clutch-controlling member movable in different directions respectively to start the machine and to stop it with a shoe under pressure, manually operative means for moving said member to start the machine, a rotatable device for moving the member to stop the machine including a spring-controlled part arranged to act first yieldingly and then positively on said member and resiliently movable thereafter to a position out of the path of starting movement of the member,

and a rotatable cam constructed and arranged to act on said member to insure firm engagement of the clutch elements with each other upon the starting of the machine and to maintain said elements in that relation substantially until said spring-controlled part becomes positive in its action on the member.

In testimony whereof I have signed my name to this specification.

ALSON H. DAVIS. 

